Free calculators for tradies and small business owners.
No ads, no sign-ups, no tracking. Every calculator runs entirely in your browser — nothing is sent to any server. Built for Australian businesses.
Markup & Margin Calculator
Convert between markup and margin percentages. See selling price, profit, and GST instantly.
Open calculatorHourly Rate Calculator
Work out what to charge per hour based on your desired take-home, expenses, and super.
Open calculatorConcrete Calculator
Calculate concrete volume for slabs, columns, and stairs. Get bag counts and cost estimates.
Open calculatorPaint Calculator
Work out how much paint you need for walls and ceilings, minus doors and windows.
Open calculatorTile Calculator
Calculate tiles needed for any area with grout spacing, waste allowance, and layout options.
Open calculatorFence Calculator
Get post, paling, rail, and concrete quantities for timber or Colorbond fences.
Open calculatorTimber & Decking Calculator
Calculate boards, joists, and bearers for your deck build with waste allowance.
Open calculatorCalculators are handy. A platform is better.
Devalo runs your CRM, calendar, marketing, and sales tracking from one place. Built in Australia for Australian businesses.